2020 presidential hopeful Beto O'Rourke, D-Texas, ramped up his rhetoric on gun control at the New HampshireDemocratic Party convention on Saturday, when he called for a mandatory gun buyback program, a national firearms registry and red flag laws, all in the same speech.The former congressman and failed Senate candidate promised to stop the sale of "weapons of war" and said every American will have to obtain a federal license if they want to own a firearm.“This is a country that has produced the leadership that will ensure that we not only have universal background checks and red flag laws and end the sale of those weapons of war, but that we go the necessary steps further as politically difficult as they may be," he told the crowd.